A 70-year-old physically-challenged woman was found dead under mysterious circumstances at her residence in Sector 21 on Sunday. The family members alleged she was murdered, while police claim she died of a natural death as the postmortem report suggest she suffered a heart attack. The family members also stated `30,000, gold earrings, gold bangles and mobile phone were missing.The victim has been identified as Satya Devi, who was 80% physically challenged and could not walk. Her husband Pankaj, 75, is hearing impaired and the couple was living alone.